It's unlikely they'd infringe on Tolkien's copyrights, at least in the US:
Tolkien was re-editing because in that year, Ace Books in the
United States published an unauthorised edition. The Fellowship
came out in May 1965, the other two volumes in July. 150,000 copies
were printed of each volume! The main text was reset, and introduced
new errors, but the appendices were reproduced photographically, and
thus contained only the errors already there. Ace Books were exploiting
a copyright loophole which meant they did not have to pay Tolkien or his
publishers any royalties. Houghton Mifflin appears to have imported too
many copies, and the notice they contain, 'Printed in Great Britain'
meant that the texts were deemed to be in the public domain in the
United States.
